Metamorphic Rock (Primarily Composed Of Minerals)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Charoite

Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Red aventurine

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Sandstone

Arenite (primarily SiO2)

Ruby in Kyanite

Corundum (Al2O3) in Kyanite (Al2SiO5)

Orange Aventurine (Sunstone-style Quartzite)

Silicon Dioxide (SiO2) with Goethite or Hematite inclusions

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Mica Schist

Mica Schist (primarily Muscovite or Biotite Schist)

Nephrite Jade (or Serpentine)

Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals

Granite

Felsic Intrusive Igneous Rock

Jasper (Multi-color Chert)

Silicon dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Ironstone Concretion (Moqui Marble variety)

Ferruginous Sandstone Concretion

African Turquoise

African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)

Diorite

Intermediate plutonic igneous rock

Amygdaloidal Basalt

Basalt with secondary amygdule minerals (likely Epidote or Chlorite)

Septarian Nodule

Septarian Nodule (Mixture of Calcite, Aragonite, and Limestone/Clay)

Geode (unopened)

Chert / Chalcedony Geode (SiO2)

Quartzite River Rock

Metamorphic Quartzite (primarily SiO2)

Red Siltstone (or Red Shale)

Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)

Serpentinite

Serpentinite (composed mainly of Group: Serpentine; (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Quartzite Pebble (with Iron Inclusions)

Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)

Limonite (after Pyrite Pseudomorph)

Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)

Quartzite

Quartzite (SiO2)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Fuchsite Quartzite (Green Quartzite)

Fuchsite-bearing Quartzite (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Moonstone

Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)

Honey Calcite

Calcium Carbonate (CaCO3)

Chalk

Micrite (primarily Calcium Carbonate, CaCO3)

Quartzite with Quartz Vein

Metamorphosed Quartz-rich Arenite (SiO2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

Quartz

Quartz (SiO₂)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Rhodonite

Rhodonite (MnSiO3)

Schist

Mica Schist